Android Open Source - android-mvc-framework Txn Scope

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License

The source code is released under:

Apache License

Java Source Code

package com.android_mvc.framework.db.transaction.todo;
/*from   w  ww .j ava2s.c om*/

import android.database.sqlite.SQLiteDatabase;

/**
 * SQLite???????????????????????????????????????????????????????TODO???
 * @author id:language_and_engineering
 *
 */
public abstract class TxnScope
{
    private boolean is_top_level = false;


    private SQLiteDatabase db;


    /**
     *  ?????????????????????DB????????????????????????????????????
     */
    protected abstract void handleDB();


    /**
     * ????
     */
    public TxnScope( SQLiteDatabase db, TxnScope upper_scope )
    {
        this.db = db;
        if( upper_scope == null )
        {
            this.is_top_level = true;
        }
    }


    /**
     * ?????????????????
     */
    public void execute( TxnListener listener )
    {
        try
        {
            manipulate_db();
            listener.onComplete();
        }
        catch( Exception e )
        {
            // TODO: ????????????????????
            // listener????????????????????????????????????????????????????
            listener.onError( e );
        }
    }


    /**
     * ???????????????????????????????????????????
     */
    public boolean execute()
    {
        try
        {
            manipulate_db();
            return true;
        }
        catch( Exception e )
        {
            // TODO:

            return false;
        }
    }


    /**
     * ??????????????????????DB??????????
     */
    private void manipulate_db() throws Exception
    {
        // NOTE: sqlite3.6.8???????????SQL?????????????????????????????????????????
        // ????????????????????????????????????????????????
        // ????RDB????????????????????????????????Command??????????????????????????????

        if( is_top_level )
            db.beginTransaction();

        try {
            handleDB();

            if( is_top_level )
                db.setTransactionSuccessful();
        }
        catch( Exception e )
        {
            throw e;
        }
        finally {
            if( is_top_level )
                db.endTransaction();
        }

    }


    /**
     * ??????????
     * ??????????????????????????????????????????????????????
     * ????????????????????????????????????????????????????
     */
    protected TxnScope getScope()
    {
        return this;
    }

}

Java Source Code List

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